Electric furnace.



E. F. PRICE.

BLBGTRIG PURNAOE.

APPLICATION FILED JAN.27. 190B. 942,350, Patented'Dec. 7, 1909.

w In T .& F

S rm I9 3 /lv 0u F i? /i/f 5 f E V wi h1 @oom n metallic containing vessel, lined as indicated to the metallic casing ofthe furnace, but is leads 9 for circuit connection, and protect- Furnaces, of which the following furnace or with the accessibility of the elecand either of opposite polarity with respect UNITED sTATEs PATENT oEEicE.

EDGAR F. PRICE, OF NIAGARA FALLS, NEW YORK, ASSIGNOR TO ELECTRO METAL- LURGICAL COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION OF WEST VIRGINIA.

ELECTRIC FURNACE.

Specification of Letters Patent.

Patented Dec. 7, 1909.

Application filed January 27, 1908. Serial No. 412,888.

above the level of the bath is a stack or liue To all whom it 'may concern: I Be it known that I, EDGAR F. Prion, a l citizen of the United States, residing at Niagara Falls, in the county of Niagara and State of New York, have invented/certain new and useful Improvements in Electric is a specitication. i The object of the invention is to provide a simple electric furnace from which the gases and dust arising from the operation are continuously withdrawn without interference with the operation of charging the 'trodes for adjustment or renewal.

The furnace is more particularly intended for the production of ferro-alloys, and such production ,may be rendered continuous by its use.

For a full understanding of the invention reference is made to the accompanying drawings, whereinc Figure 1 is a central vertical section through one form of furnace embodying the invention, and Fig. 2 is a horizontal section of the same on line 2 2 of Fig. 1. y

Referring to the drawings -1 represents a at 2 with mafrnesite or other refractory material adapted to the 'character of the operation to be carried'out.

3. is a water-jacket which may be applied not indispensable in practice.

4 represents the supporting gir-ders for the furnacev and 5, 5 the working floors, which may be of metal and disposed at about the level of the top of the furnace,

cated thereon at 6. The furnace is shown as provided with eight. vertical electrodes 7 8, having suitable ive water-jackets 9a for their exposed portions, the electrodes 7 .being of like polarity to the electrodes .8 or of the same as these. A

It will be understood that the number of electrodes may be varied as desired. Intermediate these electrodes and inlmore or less close proximity to them, and somewhat polarity 10, extending substantially the entire width of the furnace.

11 indicates the slag or molten charge, and 12 the metallic or other product.

13, 14 are the metal and slag taps respectively.

17 represents the hearth of a furnace which may be of carbon. In case the electrodes 7 and 8 areA of like polarity the hearth 17 is electrically connected with the opposite pole of the source of electricity as by a lead 1R In operating the furnace as above constructed it is found that the vertical electrodes 7, 8 when properly disposed with relation to the bottom of the stack 10 constitute a partialv continuation of the saine with the result that a transverse movement of air and furnace gases occurs between the elecv trodes and toward the stack from either side of the furnace, substantially as indicated by the arrows in Fig. l, this movement being sutiicient to convey such dust or solid particles as may arise from the furnace as well as the furnace gases or vapors, thus rendering the operation practically dustless. At the same time the posit-ion of the electrodes is such that they are readily accessible for adjustment, repair or renewal, and their terminals or supports are cooled by the induced air current. The arrangement further provides ready access to the top ofthe bath between and around the electrodes for the supply and stoking or the charge. The lateral air movement described may be accentuated 'by the provision of Shields 15 extending be- While I have illustrated a stack between the electrodes, it will be understood that any other device for withdrawing the gases at this point and inducing an inward'movement of lair across the bath may be substituted therefor.

I Chmn; y 0 and a stack disposed above the bath and be- 1. An electrlc furnace comprising an 0 en tween the electrodes, whereby the air-current vessel, oppositely disposed series of e eciowing to the stack passes around and betrodes depending into the same, and a stack tween the electrodes. 5 disposed above the bath and between the In testimony whereof I aix my signaelectrodes, whereby the air-current flowing ture in presence of two, Witnesses. to the stack passes in proximity to the electr0d5 EDGAR F. PRICE.

2. An electric furnace comprising an open Witnesses: 10 vessel, opposite series of vertically disposed, H. L. NoYEs,

spaced electrodes depending into the same, F. E. LAw'roN. 

